blob: ed1ee50c54a9ea4cc96b31fd26f0e44f4080db15 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
package de.lmu.ifi.dbs.elki.database.query.distance;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.distance.distancevalue.Distance;
/**
* Run a database query in a database context.
*
* @author Erich Schubert
*
* @param <O> Database object type.
* @param <D> Distance result type.
*/
public abstract class AbstractDatabaseDistanceQuery<O, D extends Distance<D>> extends AbstractDistanceQuery<O, D> {
/**
* Constructor.
*
* @param relation Relation to use.
*/
public AbstractDatabaseDistanceQuery(Relation<? extends O> relation) {
super(relation);
}
@Override
public D distance(O o1, DBIDRef id2) {
if(o1 instanceof DBID) {
return distance((DBID) o1, id2);
}
throw new UnsupportedOperationException("This distance function is only defined for known DBIDs.");
}
@Override
public D distance(DBIDRef id1, O o2) {
if(o2 instanceof DBID) {
return distance(id1, (DBID) o2);
}
throw new UnsupportedOperationException("This distance function is only defined for known DBIDs.");
}
@Override
public D distance(O o1, O o2) {
if(o1 instanceof DBID && o2 instanceof DBID) {
return distance((DBID) o1, (DBID) o2);
}
throw new UnsupportedOperationException("This distance function is only defined for known DBIDs.");
}
}
|